2) Vitamin D is vital, and must be supplemented. It can prevent cancers and diabetes and dementia. It is the most important vitamin.

3) Fish oil must be high quality or it can be damaging. Low quality fish oils have zero effectiveness.

4) Slow food, not fast food. Do not burn or rush cooking. Butter, NOT margarine or vegetable oils. Ever.

5) EXERCISE.

Follow these rules and you won't need any diet or health books. For the full breakdown (why and how of science), plus recipes, plus motivation, plus links, plus case studies, order the audiobook (well read by Adam Verner.)